it's so much worse than your thinking. This is from Earnest Becker he received a noble prize for this.
This symbolic self-focus takes the form of an individual's "
immortality project" (or "
causa sui project"), which is essentially a symbolic belief-system that ensures oneself is believed superior to physical reality. By successfully living under the terms of the immortality project, people feel they can become heroic and, henceforth, part of something eternal; something that will never die as compared to their physical body. This, in turn, gives people the feeling that their lives have meaning, a purpose, and are significant in the grand scheme of things.
Becker argues that the arbitrariness of human-invented immortality projects makes them naturally prone to conflict. When one immortality project conflicts with another, it is essentially an accusation of 'wrongness of life', and so sets the context for both aggressive and defensive behavior. Each party will want to prove its belief system is superior, a better way of life. Thus these immortality projects are considered a fundamental driver of human conflict, such as in WARS, BIGOTRY, GENOCIDE, and RACISM.
Or in other words refusing to accept death is a primary driver for war, bigotry, genocide and racism on top of what you said.